.
4 The gas which passes into and out out of the
lungs unchanged is:
a) Oxygen
b) nitrogen
c) carbon dioxide
dj water vapour
Answers
Answered by
1
Answer:
umm is it nitrogen
not sureee
Answered by
0
Answer:
oxygen and carbondioxide
Explanation:
because we inhale oxygen and exhale carbondioxide while taking breathe
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